X820XXSADZH1 – Galaxy Tab S10+ firmware

Build X820XXSADZH1 is a security update for the Galaxy Tab S10+ (SM-X820) on Android 16 (One UI 8). It first appeared on Samsung's servers on Aug 30, 2026 (method) and has reached 18 regions so far. It raises the bootloader bit from 9 to 10: once installed, the device no longer accepts firmware with bit 9 or lower, so a downgrade to X820XXS9DZG1 is blocked. Samsung still serves this file.

Model
SM-X820
Android
Android 16
Type
Security
Bootloader bit
10
First released
Aug 30, 2026
Regions
18

Rollout timeline by region

The date each region code (CSC) first received X820XXSADZH1, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
KOOSouth KoreaAug 30, 2026day 0X820XXSADZH1/X820OXMADZH1/X820XXSADZH1
EUXEurope (Multi-CSC)Sep 7, 2026+8 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
EUYEurope (Multi-CSC)Sep 7, 2026+8 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
BNGBelgiumSep 8, 2026+9 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
INSIndiaSep 8, 2026+9 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
XACCanadaSep 8, 2026+9 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
XARUSA (Cellular South)Sep 8, 2026+9 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
ZTOBrazilSep 10, 2026+11 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
CAUCaucasusSep 13, 2026+14 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
ILOIsraelSep 13, 2026+14 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
TURTurkeySep 13, 2026+14 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
XSGUnited Arab EmiratesSep 13, 2026+14 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
XSPSingaporeSep 13, 2026+14 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
XIDIndonesiaSep 13, 2026+14 daysX820XXSADZH1/X820OLEADZH1/X820XXSADZH1
XJPJapanSep 14, 2026+15 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
MXOMexicoSep 14, 2026+15 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
BRITaiwanSep 15, 2026+16 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1
TGYHong KongSep 15, 2026+16 daysX820XXSADZH1/X820OXMADZH1/X820XXSADZH1

Download and release notes

samloader download -m SM-X820 -r EUX -v X820XXSADZH1/X820OXMADZH1/X820XXSADZH1

Samsung's release notes and security patch level for this update: SM-X820 / EUX on doc.samsungmobile.com. What each part of the build number means: decode X820XXSADZH1.